I really like dark green t-shirts and have never been called a leprechaun. Thanks for the advice and reference pics. You may find some inspiration here: So don't feel like you need to exclusively buy blue and green. Red, orange, yellow all look terrible on me, I've utterly given up on that region of the color wheel. Orange based red, aka "warm toned".
Cool gray is more of a blue gray and warm gray is more of a reddish gray.
How to Select Clothing Colors for a Redhead
I've heard that "jewel" colors are good, though -- greens, blues, blue-based reds. Want to add to the discussion? Like, I have no fucking clue man, you're the expert! As a ginger, earth tones and blues have been kind to me. Navy, grey, and olive that isn't too green have always worked very well for me. Colours that look good with orange. Occasionally my brothers or friends will harass me and check the labels of the shirts I'm wearing.